Mechanical hammer.



H. JUST.

MECHANICAL HAMMER.

APPLICATION TILED FEB.21,1914.

' 1,123,547, Patented Jan 25,1915.

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HERMANN JUST, OF BERLIE-TEMPELHOF,

ELEKTBISCHE NEE?- GESELLSCK A @EEHZAI; Y.

EIECEAIEIICCA' Application filed February 21, 1231 .5

l ILMA the ram is pcsitively withdrawn by the gear employed fer drivingthe hamfire presses invention such meal is dispensed with. will Be 210bselzward. shock, and plunger which is rigidly coupled is 5 "will slideheel: in a smeedi r The motor may rise to abeu'l;

revoluien will yield iizs ensire Only as themcmeni: of tile 131113536,with iiie spring ri idly connected fiD-lllh? ram. is pushed back by theoscill'm spiking andby thereec'tion of the impact on the shank: of thechisel size.

sis? t? speed than a positively withdrawn plunger 50 that, as it hasbeen peev d. by esperin xeits, the plunger will have already slerted sfer ard stroke While the r in during its return strok has but linearlength 0% i.

the Til l iei req'lziremem icr praclicai mcclia val amine: is that it isa" i that r cine non-classic blows ere mszz, reaction 0r 01301: id, Wills very disagreeable 2'70 the operate-: Which may be considerably reducedby the provision of suitable springs In the nccempanying drawing: Figurel is a longitudinal section of a mechanical hammer embodyingmyinvention, lowing the plunger rzii ed; 2 is a similar sec i'icnGEREEANY, U31? IlZEISSEL-H MIT BESCI-IKANKTER Zm..,i,TUl lG, OFIEUSSELDQ ASSIGEIGF, TC THE IEIP'VI OF 'AMIVIER VER YEETUNGS- The hemr.er comprises a steel sleew e a mic thereer end of which she crank cesing5 containing ihe crank 2' is screwed. In I from: the sleeve carries thescrewed head a, into "which she chisel, rivaling hammer or the like isfitted. The crank, which is preferably counterbalanced, is driven bymeans of a flexible shaft Whisk is coupled to a moses. "connecting redIt 1 is'ccripied at ire other 1 5;, so that, when the plunger reclz'ccaficd nsnm the coiled ram 4 0 cured, This spring, which ed a nimblesize, rigidly ewe the flexible chef reiuted revolved s revolution '5;

h hereinbefore d -s to the plilnger g. -i fleexi in posisien the plungerpresses spring 6 attached '50 the ram, 1 1i bEEi'iS geinst the chisel orriveting hammer. The spring a is sherebjy compressed :0 cerisin 1 Ice,When she plunger recedes the spri g rebound, so that movemcnt.

transreceives 2: vi lowing advance oi" the plunger, will strike the at escmewlias moment the impact 'W'l be me lent wl'lereupcn am; under ac'ilie mess wily released and assisted by imp-act man i'JQfOlQ. men;incress secomls t FT I tool jumps 02 v, ]ill'll])lllg move cnmferentiulvelocity of {he crane. lien, transmitted to the ram, imparts to thelatter a hammering motion. The whole energy of the motoris thereforecombined in the Workingblow. so that the power consumed is utilized tomore than 85%.

I claim:

A mechanical hammer comprising a fink, a cylinder. an inclosed plungerposi- "ci" and rectilinesrly driven by'" said ram acting on the tool, asoiled ch again i.

spring rigidly attached to said ram, said In testimony whereof I havehereunto set spring being adapted to receive the impact my signature inthe presence of two subof the plunger at the moment of the maxiscribingwitnesses. mum linear velocity of the latter, said ram 5 and springbeing independent of the Witnesses:

plunger and adapted to oscillate between WOLQEMAR HAUPT, the saidplunger and the end of the tool. HENRY HAsPnn.

HERMANN JOsT.

